package com.atguigu.gulimall.product.web;

import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.Catelog2Vo;
import org.redisson.api.RLock;
import org.redisson.api.RReadWriteLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Controller
public class IndexController {
    @Autowired
    RedissonClient redisson;

    @Autowired
    CategoryService categoryService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @GetMapping({"/","/index.html"})
    public String indexPage(Model model){

        //TODO 1.查出所有的1级分类

        List<CategoryEntity> categoryEntityList = categoryService.getLevel1Category();

        //视图解析器进行拼接字符串:
        // pin'cclasspath:/templates/ 返回值 .html

        model.addAttribute("categorys",categoryEntityList);

        return "index";
    }

    @ResponseBody
    @GetMapping("/index/catalog.json")
    public Map<String,List<Catelog2Vo>> getCatalogJson(){
        Map<String,List<Catelog2Vo>> map = categoryService.getCatalogJson();
        return map;
    }

    @ResponseBody
    @GetMapping("/hello")
    public String hello(){
        //1.获取一把锁，只要锁的名字一样，就是同一把锁
        RLock lock = redisson.getLock("my-lock");

        //2.加锁
        lock.lock();//阻塞时等待，默认加的锁都是30s时间
        //1).锁的自动续期，如果业务超长，运行期间自动给锁续上新的30s。不用担心业务时间长，锁自动过期被删除
        //2).加锁的业务只要运行完成，就不会给当前锁续期，即使不手动解锁，锁默认在30s以后自动删除
        try {
            System.out.println("加锁成功，执行业务..."+Thread.currentThread().getId());
            Thread.sleep(30000);
        }catch (Exception e){

        }
        finally {
            //3.调用解锁
            System.out.println("释放锁..."+Thread.currentThread().getId());
            lock.unlock();
        }

        return "hello";
    }

    @ResponseBody
    @GetMapping("/write")
    public String writeValue(){
        RReadWriteLock lock = redisson.getReadWriteLock("rw-lock");
        String s = "";
        RLock rLock = lock.writeLock();
        try {
            rLock.lock();
            s = UUID.randomUUID().toString();
            Thread.sleep(30000);
            redisTemplate.opsForValue().set("writeValue",s);
        }catch (InterruptedException e){
            e.printStackTrace();
        }finally {
            rLock.unlock();
        }
        return s;
    }

    @ResponseBody
    @GetMapping("/read")
    public String readValue(){
        RReadWriteLock lock = redisson.getReadWriteLock("rw-lock");
        String s = "";
        RLock rLock = lock.readLock();
        rLock.lock();
        try {
            s= redisTemplate.opsForValue().get("writeValue");
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            rLock.unlock();
        }
        return s;
    }
}
